MQX Software SolutionsのトピックRe: K20 - MFS with external serial (SPI) flash part - formatting device

K20 - MFS with external serial (SPI) flash part - formatting device

brentwilliams — Mon, 28 Oct 2013 15:12:26 GMT

Hello,

I am in the process of trying to get MFS working with my external serial (SPI) flash part. I have created a flash spi driver that I am able to communicate to the part with.

I have used io_msf_install() to install the MFS over the spi flash driver.

The main issue I am having now is formatting the flash device.

The MFS documentation states that you can format the device via an ioctl call - IO_IOCTL_FORMAT and filling in the following structure:

typedef struct mfs_format_data

{

uchar PHYSICAL_DRIVE;

uchar MEDIA_DESCRIPTOR;

uint_16 BYTES_PER_SECTOR;

uint_16 SECTORS_PER_TRACK;

uint_16 NUMBER_OF_HEADS;

uint_32 NUMBER_OF_SECTORS;

uint_32 HIDDEN_SECTORS;

uint_16 RESERVED_SECTORS;

} MFS_FORMAT_DATA, _PTR_ MFS_FORMAT_DATA_PTR;

In the data sheet for my spi external flash I have the BYTES_PER_SECTOR, NUMBER_OF_SECTORS. I am not sure what to put in for:

NUMBER_OF_HEADS??

SECTORS_PER_TRACK??

HIDDEN_SECTORS??

RESERVED_SECTORS??

Is there another way to format the device?

Is what I am trying to do even feasible?

Thanks for your help,

Brent

Re: K20 - MFS with external serial (SPI) flash part - formatting device

robsnell — Tue, 19 Nov 2013 19:17:28 GMT

I don't assert that this completely answers your question, but I think that this website may help: www.tavi.co.uk/phobos/fat.html

If the file system is using FAT, then his descriptions of these components may be useful.

Re: K20 - MFS with external serial (SPI) flash part - formatting device

brentwilliams — Thu, 21 Nov 2013 20:30:40 GMT

Thanks Rob

Re: K20 - MFS with external serial (SPI) flash part - formatting device

soledad — Tue, 20 Jan 2015 15:25:07 GMT

Hello Brent,

Did you resolve this issue?

Which MQX version are you using?

Regards

Sol